I noticed today on seatcounter that for at least one flight (CO19 21nov08), co shows no BF availability while Emirates 6319 (the codeshare) shows 4 seats in BF (C class). [I confirmed the lack of BF availability on co.com.] I assume that there is some sort of agreement to hold these seats in the hope that someone forks over the rather exorbitant asking price ($6777 US).

So assuming that these seats aren't sold at that price, do they get released back to CO? Might one become available for a mileage+copay upgrade? More to the point, what's up with that?